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$24.95 + $9.12 shipping
In Stock. Sold by Heartland Natural

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HEARTLAND 21000 Dryer Vent Closure

4.7 out of 5 stars 478 customer reviews
| 56 answered questions

Price: $24.95 + $9.12 shipping
In Stock.
Ships from and sold by Heartland Natural.
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  • Easy-to-install dryer vent closure
  • Lets warm air escape when open
  • Prevents cold air from entering when closed
  • Prevents insects from entering through dryer vent
  • Vent must be installed vertically and sliding may need to cut for proper installation.

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$24.95 + $9.12 shipping In Stock. Ships from and sold by Heartland Natural.

Frequently Bought Together

  • HEARTLAND 21000 Dryer Vent Closure
  • +
  • Heartland 21000 Dryer Vent Extension Accessory
Total price: $32.90
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Product Description

From the Manufacturer

This easy-to-install dryer vent closure lets warm air escape when open and prevents cold air from entering when closed. It also prevents insects from entering through the dryer vent.

Product Information

Technical Details

Part Number 21000
Item Weight 1.8 pounds
Product Dimensions 7.5 x 7.5 x 13.5 inches
Item model number 21000
Color Color
Volume 1 cubic centimeters
Item Package Quantity 1
Batteries Included? No
Batteries Required? No
Warranty Description 90 DAYS

Additional Information

ASIN B00009W3I4
Customer Reviews
4.7 out of 5 stars 478 customer reviews

4.7 out of 5 stars
Best Sellers Rank #19,777 in Home Improvements (See top 100)
#10 in Home Improvement > Building Supplies > Building Materials > Roofing > Vents > Roof Vents
Shipping Weight 1.8 pounds (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item is not eligible for international shipping. Learn More
Date First Available May 14, 2003

Warranty & Support

Product Warranty: For warranty information about this product, please click here


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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

I cannot say enough good things about this product. Both I, and my brother-in-law, have had this vent closure installed on our homes for several years with no complaints whatsoever. I find it hard to believe some of the things said by two other reviewers.

One says the vent makes a mess - uh, DUH! Your dryer is making the mess, not the vent closure. Your dryer's filter screen lets a lot escape, and so it exits the vent closure as it should! If it didn't escape it would clog the vent and cause a dryer fire as air flow is strangled causing temperature to rise in the line.

Another reviewer wrote a book about his brick problems, even complaining about having to use caulking. He also said it HAD to be painted to prevent ultra violet light damage. Well, if caulk is a problem then let it leak air. The heat loss will equal the cost of a case of caulk in short order, but that is the alternative. As for HAVING to paint it, nothing could be further from the truth! Mine, and my brother-in-law's, have been unpainted for many years now with no signs of brittleness yet. But, if you want to paint it, that should take a whopping 15 minutes. Geez, a complainer in every crowd, I guess!

My vent closure has eliminated cold air from entering the laundry room! Opening our dryer door used to feel like opening a freezer door. Our feet would turn to ice in that room until I installed this vent closure!! And the floating cup, despite lint build-up, has maintained a tight air, bug & rodent-proof seal when the dryer is not running. It cleans easily if you have even the slightest mechanical skills.

In my opinion, this product will pay for itself in home heating and cooling costs in less than one season while keeping out rodents and insects. Don't let the naysayers seize the day!!!
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I had the same problem as many other reviewers for this product have reported: an unusually cold laundry room that was noticeably cooler than the hallway leading to it or the rest of the house, even though the laundry room has a heating/air conditioning duct. After installing better weatherstripping in the window and more insulation in the (unheated) space above the ceiling, the room was still cooler than it should have been. Turned out the problem was the cheap metal dryer flap vent which was perpetually held cracked open by lint and other debris, allowing cold air to come in through the dryer and to radiate through the thin plastic hose.

I can report that this device significantly improved the situation. The room is noticeably warmer since I installed it. The design is clever - on the inside there is a plastic cap that is blown up when the dryer is turned on, but because it is contained within the plastic housing, it will always drop perfectly back into place, sealing the opening, once the dryer shuts off. Moreover, there is no way lint can get caught in the wrong place to cause the cap not to seat properly. Note that you cannot see this interior cap in the picture, but if you remove the saucer shaped lid on top of the unit (which you CAN see in the picture), the cap I'm talking about is there on the inside, fitting over the tube that forms the terminus of your dryer duct.

I can't comment on the situation of the person (one-star reviewer) dealing with a masonry wall, who needs to get an appropriately sized piece of PVC pipe to use as an extender. What I can say is that I was able to properly install my vent on an insulated fiberboard exterior wall sheathed with aluminum siding in about 15 minutes.
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I bought this dryer vent about 16 years ago. We had birds constantly trying to build nests inside the old style exterior vents. I saw this in one of the "specialty" catalogs back in the 90's and thought it was worth the shot, even at $39 a pop back then. Amazon & eBay were not around just yet so I had no choice but to purchase through a catalog.

Well it's been in steady use since I installed it. Has survived hot summers, driving rain and snow storms. It succumbed though last winter when we had a series of freeze-thaw & snow. It's failure was not directly due to the weather and certainly not a product defect as it is still functioning today. It met its demise when a huge icicle handing from a gutter above let loose and crashed into the top of the vent. Well it still remained attached to the house but the removable cap was cracked in 2 places. I was able to piece it together with some fiberglass resin but it just wasn't the same & didn't hold long.

I think the Heartland model would work better than the other brand with the floating cap as based on my experience, after time I think the cap would fail & remain slightly open. That's all animals would need to get in, a slight opening. The cap on the Heartland model is fixed and not easy for animals to open.

About a month ago we had a period of high winds which blew the cap off & into a neighbors yard. The body of the vent is still attached to the house & unharmed. But the latest air trip for the cap did it in. I couldn't piece it together and I tried unsuccessfully using other plastic caps. So that brings me to shopping for a new vent. I don't remember the exact brand I bought years ago but the name Heartland does sound familiar. and I really like the price this time around.

I only need the cap but it looks like I'll need to buy the whole unit. Overall, a great well performing product.
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